How to Install Post Base Brackets


Builders use post brackets to fasten wood posts to concrete slaps, concrete pillars or other structural elements. While a number of designs are commercially available, they all serve the same purpose. They provide connectivity between a horizontal surface and a vertical post. Builders decide on which bracket to use based on the strength necessary to complete the project and the physical appearance of the bracket.

Things You'll Need

  • Post brackets
  • Power drill
  • Masonry screws
  • Wood screws or lag screws
  • Screwdriver or wrench
  • Determine the proper placement of the post. The bracket holds the base of the post, so the bracket must be directly under the planned post location. If the railing or other deck or fence structure is in place, drop a weighted string from location to base where the post will attach to determine the post base bracket location.

  • Place the bracket on the horizontal surface at the determined location. Mark the locations of the holes in the base of the bracket.

  • Drill pilot holes at the locations marked in Step 2. If the base is concrete, use a masonry drill to create a hole large enough to accommodate the largest screw that will fit through the holes in the bracket. Fit the expandable portion of the masonry screw assembly into the holes. Set the bracket back in place and drive screws through the holes into the expandable masonry screw pieces.

  • Place the post in the upright portion of the bracket. Check the post's vertical straightness with a carpenter's level. Place wood screws or lag bolts through the holes in the bracket. Use the largest screw or bolt that will fit through the hole. Tighten the screw or bolt using a screwdriver or wrench.

Tips & Warnings

  • Choose a bracket that fits the size of the post. Brackets are available in many of the standard sizes of dimensional lumber. Brackets are also available for metal or wrought iron fences.

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